diff --git a/src/app/(frontend)/agentic-design-patterns/[slug]/opengraph-image.tsx b/src/app/(frontend)/agentic-design-patterns/[slug]/opengraph-image.tsx
index 294d1be..92e4d0e 100644
--- a/src/app/(frontend)/agentic-design-patterns/[slug]/opengraph-image.tsx
+++ b/src/app/(frontend)/agentic-design-patterns/[slug]/opengraph-image.tsx
@@ -24,6 +24,10 @@ export const alt = "Agentic design pattern reference card";
 export const size = { width: 1200, height: 630 };
 export const contentType = "image/png";
 
+const SITE_DOMAIN = process.env.NEXT_PUBLIC_SERVER_URL
+  ? new URL(process.env.NEXT_PUBLIC_SERVER_URL).hostname
+  : "detached-node.dev";
+
 // Pre-bake one OG image per non-archived pattern at build time.
 export async function generateStaticParams(): Promise<{ slug: string }[]> {
   return getPatternSlugs().map((slug) => ({ slug }));
@@ -128,7 +132,7 @@ export default async function OgImage({ params }: OgImageProps) {
           }}
         >
           <span>Agentic Design Patterns</span>
-          <span>detached-node.com</span>
+          <span>{SITE_DOMAIN}</span>
         </div>
       </div>
     ),
diff --git a/src/app/(frontend)/agentic-design-patterns/[slug]/page.tsx b/src/app/(frontend)/agentic-design-patterns/[slug]/page.tsx
index 52af6ac..15073a9 100644
--- a/src/app/(frontend)/agentic-design-patterns/[slug]/page.tsx
+++ b/src/app/(frontend)/agentic-design-patterns/[slug]/page.tsx
@@ -116,15 +116,9 @@ export default async function PatternSatellitePage({
             />
             <ReferencesSection pattern={pattern} />
             {overviewLead && (
-              <DisclosureSection
-                id="overview-discussion"
-                label="Overview · 1-paragraph mechanism"
-                defaultOpen
-              >
-                <p className="text-base leading-7 text-text-secondary [text-wrap:pretty]">
-                  {overviewLead}
-                </p>
-              </DisclosureSection>
+              <p className="text-base leading-7 text-text-secondary [text-wrap:pretty]">
+                {overviewLead}
+              </p>
             )}
             {backgroundParagraphs.length > 0 && (
               <DisclosureSection
diff --git a/src/app/(frontend)/agentic-design-patterns/opengraph-image.tsx b/src/app/(frontend)/agentic-design-patterns/opengraph-image.tsx
index 8b335af..509e70e 100644
--- a/src/app/(frontend)/agentic-design-patterns/opengraph-image.tsx
+++ b/src/app/(frontend)/agentic-design-patterns/opengraph-image.tsx
@@ -22,6 +22,10 @@ export const alt = "Agentic Design Patterns reference catalog";
 export const size = { width: 1200, height: 630 };
 export const contentType = "image/png";
 
+const SITE_DOMAIN = process.env.NEXT_PUBLIC_SERVER_URL
+  ? new URL(process.env.NEXT_PUBLIC_SERVER_URL).hostname
+  : "detached-node.dev";
+
 export default async function OgImage() {
   const subtitle = "A reference catalog of agentic AI design patterns.";
   const footerStat = "5 layers · reference catalog";
@@ -106,7 +110,7 @@ export default async function OgImage() {
           }}
         >
           <span>{footerStat}</span>
-          <span>detached-node.com</span>
+          <span>{SITE_DOMAIN}</span>
         </div>
       </div>
     ),
diff --git a/src/app/sitemap.ts b/src/app/sitemap.ts
index 28be2d7..d32e1fb 100644
--- a/src/app/sitemap.ts
+++ b/src/app/sitemap.ts
@@ -10,19 +10,16 @@ export default async function sitemap(): Promise<MetadataRoute.Sitemap> {
       url: siteUrl,
       lastModified: new Date(),
       changeFrequency: "weekly",
-      priority: 1,
     },
     {
       url: `${siteUrl}/posts`,
       lastModified: new Date(),
       changeFrequency: "daily",
-      priority: 0.9,
     },
     {
       url: `${siteUrl}/about`,
       lastModified: new Date(),
       changeFrequency: "monthly",
-      priority: 0.8,
     },
   ];
 
@@ -32,13 +29,11 @@ export default async function sitemap(): Promise<MetadataRoute.Sitemap> {
       url: `${siteUrl}/agentic-design-patterns`,
       lastModified: new Date(),
       changeFrequency: "weekly",
-      priority: 0.95,
     },
     {
       url: `${siteUrl}/agentic-design-patterns/changelog`,
       lastModified: new Date(),
       changeFrequency: "weekly",
-      priority: 0.7,
     },
   ];
   const adpSatelliteRoutes: MetadataRoute.Sitemap = PATTERNS.filter(
@@ -47,7 +42,6 @@ export default async function sitemap(): Promise<MetadataRoute.Sitemap> {
     url: `${siteUrl}/agentic-design-patterns/${p.slug}`,
     lastModified: new Date(p.dateModified),
     changeFrequency: "monthly" as const,
-    priority: 0.85,
   }));
 
   // Fetch published posts
@@ -56,7 +50,6 @@ export default async function sitemap(): Promise<MetadataRoute.Sitemap> {
     url: `${siteUrl}/posts/${post.slug}`,
     lastModified: new Date(post.updatedAt),
     changeFrequency: "weekly" as const,
-    priority: 0.7,
   }));
 
   // Fetch published pages
@@ -67,7 +60,6 @@ export default async function sitemap(): Promise<MetadataRoute.Sitemap> {
       url: `${siteUrl}/${page.slug}`,
       lastModified: new Date(page.updatedAt),
       changeFrequency: "monthly" as const,
-      priority: 0.6,
     }));
 
   return [
diff --git a/src/components/agentic-patterns/PatternHeader.tsx b/src/components/agentic-patterns/PatternHeader.tsx
index f884a14..f47a8a8 100644
--- a/src/components/agentic-patterns/PatternHeader.tsx
+++ b/src/components/agentic-patterns/PatternHeader.tsx
@@ -12,6 +12,7 @@
 
 import type { LayerId, Pattern } from "@/data/agentic-design-patterns/types";
 import { LAYERS } from "@/data/agentic-design-patterns/layers";
+import { formatDate } from "@/lib/formatting";
 
 interface PatternHeaderProps {
   pattern: Pattern;
@@ -49,6 +50,12 @@ export function PatternHeader({ pattern }: PatternHeaderProps) {
           {pattern.oneLineSummary}
         </p>
       )}
+      <time
+        dateTime={pattern.dateModified}
+        className="text-sm tracking-[0.03em] text-text-tertiary"
+      >
+        Last edited {formatDate(pattern.dateModified)}
+      </time>
     </header>
   );
 }
diff --git a/src/lib/schema/config.ts b/src/lib/schema/config.ts
index bf8f076..9bea87e 100644
--- a/src/lib/schema/config.ts
+++ b/src/lib/schema/config.ts
@@ -41,6 +41,6 @@ export const AUTHOR_CONFIG = {
   // sameAs: external verifiable profiles for entity disambiguation.
   // GitHub org is the one confirmed external reference at launch.
   // Add LinkedIn/Twitter/etc. when/if disclosed.
-  sameAs: ["https://github.com/detached-node"] as string[],
+  sameAs: ["https://github.com/julianken"] as string[],
   description: "Writing on agentic AI in software engineering.",
 } as const;
diff --git a/src/lib/site-config.ts b/src/lib/site-config.ts
index cf9277f..f2e0920 100644
--- a/src/lib/site-config.ts
+++ b/src/lib/site-config.ts
@@ -15,6 +15,8 @@ export const siteDescription =
 
 export const siteAuthor = "detached-node";
 
+export const CONTACT_EMAIL = "julian.kennon.d@gmail.com";
+
 export const siteKeywords = [
   "agentic AI",
   "autonomous systems",